Wifi Door And Window Sensors, Free Notification App Control Smart Home, Pack). Product Details [WIFI wireless connection] By connecting WIFI and mobile phone connection, whether you are at home or away, Instant notification to your phone immediately when door or window is opened or closed. [Multiple Uses]Install the Alarm Sensor not only on front doors or windows, but also on garage doors, liquor cabinets, front gate, safety deposit box, pet doors and more. [Compatible with Alexa and Google Home] No hub required and No fees charge. Pair our Smartlife app with either Alexa or Google Home and enjoy knowing the status of your door sensor without needing to use your phone. Convenient for you to detect your doors, windows, cabinets, drawers or anywhere you want to notified when it is opened or closed. [Easy Install] No complicated installation tools are required. Please scroll down find the video in the main page how to add sensor to WIFI and Alexa.Low power consumption door sensor, super-long battery life avoid replacement frequently [Product quality and service] Our products are 100% tested and ensure that all products are qualified products before leaving the factory,and provide two-year warranty. Please rest assured to purchase and use.If you have any questions about the alarm system, please contact our customer - service anytime. We will solve it for you and make you satisfaction. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.